共 50 条
- [21] PROTECTIVE CHARACTERISTICS OF A 20-INCH ROD GAP IEEE TRANSACTIONS ON POWER APPARATUS AND SYSTEMS, 1965, PA84 (02): : 177 - &
- [23] PRECISION OBTAINABLE WITH THE 20-INCH CARNEGIE ASTROGRAPH ASTRONOMICAL JOURNAL, 1957, 62 (04): : 113 - 119
- [30] Internal inspection of 20-inch natural gas pipeline PIPELINES IN THE CONSTRUCTED ENVIRONMENT, 1998, : 387 - 396